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What is Default profile location in Firefox 4

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I need to modify Firefox Default profile (change some settings in prefs.js and users.js files, change default bookmarks file and permissions.sqlite for popup behavior) in Firefox 4.

That default profile does not come anymore under any folders (or atleast I did not find that), but that is available inside omni.jar file. Unfortainately that location modification is not coming into new users profile, so I really have not seen now something.

But I would need to modify this so, that every new user profile would get correct bookmarks etc at the first Firefox start from there automatically.

I need to modify Firefox Default profile (change some settings in prefs.js and users.js files, change default bookmarks file and permissions.sqlite for popup behavior) in Firefox 4. That default profile does not come anymore under any folders (or atleast I did not find that), but that is available inside omni.jar file. Unfortainately that location modification is not coming into new users profile, so I really have not seen now something. But I would need to modify this so, that every new user profile would get correct bookmarks etc at the first Firefox start from there automatically.

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That folder doesn't exist by default, but you can still create a \defaults\profile template folder and place files in it to initialize a new profile.

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Has anyone modify the default profile on the mac side of things. I used to right click Firefox in applications and chose 'Show Package Contents' and then I could modify the prefs.js file the way that I wanted it. I don't currently see a way to do this in Firefox 4.